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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3006) Improve the error message when attempting manual failover with auto-failover enabled
Date Fri, 01 May 2015 23:36:06 GMT

    [ https://issues.apache.org/jira/browse/YARN-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524300#comment-14524300
] 

Wangda Tan commented on YARN-3006:
----------------------------------

+1 for latest patch, committing.

> Improve the error message when attempting manual failover with auto-failover enabled
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-3006
>                 URL: https://issues.apache.org/jira/browse/YARN-3006
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.6.0
>            Reporter: Akira AJISAKA
>            Assignee: Akira AJISAKA
>            Priority: Minor
>         Attachments: YARN-3006.001.patch
>
>
> When executing manual failover with automatic failover enabled, UnsupportedOperationException
is thrown.
> {code}
> # yarn rmadmin -failover rm1 rm2
> Exception in thread "main" java.lang.UnsupportedOperationException: RMHAServiceTarget
doesn't have a corresponding ZKFC address
> 	at org.apache.hadoop.yarn.client.RMHAServiceTarget.getZKFCAddress(RMHAServiceTarget.java:51)
> 	at org.apache.hadoop.ha.HAServiceTarget.getZKFCProxy(HAServiceTarget.java:94)
> 	at org.apache.hadoop.ha.HAAdmin.gracefulFailoverThroughZKFCs(HAAdmin.java:311)
> 	at org.apache.hadoop.ha.HAAdmin.failover(HAAdmin.java:282)
> 	at org.apache.hadoop.ha.HAAdmin.runCmd(HAAdmin.java:449)
> 	at org.apache.hadoop.ha.HAAdmin.run(HAAdmin.java:378)
> 	at org.apache.hadoop.yarn.client.cli.RMAdminCLI.run(RMAdminCLI.java:482)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> 	at org.apache.hadoop.yarn.client.cli.RMAdminCLI.main(RMAdminCLI.java:622)
> {code}
> I'm thinking the above message is confusing to users. (Users may think whether ZKFC is
configured correctly...) The command should output error message to stderr instead of throwing
Exception.



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